Purg.
| Author(s) | Title | Reference | |
|---|---|---|---|
| Colin Hardie | A Concordance to the Divine Comedy of Dante Alighieri, by Ernest Hatch Wilkins, Thomas Goddard Bergin, Anthony J. De Vito | 35/2, p. 146 | |
| Colin Hardie | Structure and Thought in the Paradiso, by Joseph Antony Mazzeo | 29/3, p. 200 |